KIEV (Reuters) - Ukrainian police said they had detained 56 members of far-right radical groups in Kiev on Sunday after scuffles before the capital's gay pride march.

Otherwise, the annual rally of several thousand supporters of lesbian, gay, bisexual and transgender rights took place without serious incident.

Early in the morning, more than 150 far-right protesters had sought to block off the route of the march through central Kiev. Small clashes broke out when police in riot gear moved to clear the street.

"Several men who resisted and used gas canisters against law enforcement officers were detained," the police said in a statement.

Far-right group C14 said police had surrounded its protesters, attacking them with batons and tear gas. "Look at how they protect 'sexual minorities' and violate the rights of regular Kiev citizens," it said in a post on Facebook.

More people were detained in a subsequent altercation near the Opera House, police said.

Kiev's 2015 pride march was disrupted by violent attacks, but a substantial police presence kept the events in 2016 and 2017 largely peaceful.

Last week, however, leading human rights organizations rebuked the authorities for police inaction in response to rising violence against ethnic minorities, women's rights activists and LGBT people.

The government has increased support for LGBT rights since a Western-backed leadership came to power in 2014, but critics say homophobic attitudes remain relatively widespread.

(Reporting by Alessandra Prentice and Valentyn Ogirenko; editing by Larry King and Jason Neely)